CN206755199U - A kind of sootblower arrangement - Google Patents
A kind of sootblower arrangement Download PDFInfo
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- CN206755199U CN206755199U CN201720500364.5U CN201720500364U CN206755199U CN 206755199 U CN206755199 U CN 206755199U CN 201720500364 U CN201720500364 U CN 201720500364U CN 206755199 U CN206755199 U CN 206755199U
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- Prior art keywords
- soot blower
- valve
- shower nozzle
- wall
- air
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- 239000004071 soot Substances 0.000 claims abstract description 68
- 238000007664 blowing Methods 0.000 claims abstract description 33
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 230000001464 adherent effect Effects 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010926 purge Methods 0.000 claims description 12
- 206010037544 Purging Diseases 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000011109 contamination Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Incineration Of Waste (AREA)
Abstract
It is simple in construction, cost economy, stable the utility model discloses a kind of sootblower arrangement that can alleviate water wall high temperature corrosion, the effect of protection furnace wall cooling can be functioned well as.The utility model includes soot blower system and automatic control system, and wherein soot blower system includes bushing type shower nozzle, Venturi nozzle, helix tube, soot blower valve, air valve.Shower nozzle outer tube is connected with the compressed air attracted from secondary air box, and compressed air is as adherent wind medium;Inner tube is connected with the high-temperature high-pressure steam attracted from reheater entrance header, and vapor is as sootblowing dielectric.Soot blower valve and air valve are alternately opened so that are blown into compressed air to burner hearth by nozzle in soot blowing gap, so as to form adherent wind diaphragm at water-cooling wall, are played a part of protecting water-cooling wall pipeline.
Description
Technical field
It the utility model is related to a kind of sootblower arrangement, and in particular to a kind of soot blowing that can alleviate water wall high temperature corrosion
Device device, belong to power boiler burning technical field.
Background technology
China has carried out more strict thermal power plant's pollutant emission standard, the newly-built coal-burning power plant of key area at this stage
NOx discharge standard is reduced to 50mg/Nm3, coal unit generally carried out low NO transformation, and this has resulted in burner hearth water
Anoxycausis at cold wall, form strong reducing property atmosphere.Pyrite in coal is easily converted into corrosivity pole in combustion
Strong hydrogen sulfide gas, and because water-cooling wall pipeline wall surface temperature is higher, greatly accelerate the process of high temperature corrosion.By to water
The situation of cooling wall high-temperature corrosion is studied it can be found that pipeline weakened region is often dust stratification critical regions again, and dust stratification will add
The speed of fast high temperature corrosion, corrosion rate is up to 2.0-2.5mm/a when dust stratification be present.When water-cooling wall pipeline is because of corrosion thinning to one
" booster " accident when determining degree, is will result in, has a strong impact on economic benefit and the safe operation of power plant.
In recent years it has been proposed that the measure of many pre- high temperature corrosion resistances, but it is ineffective, there is asking following aspects
Topic:Adherent wind is set up in perforate at water-cooling wall, and inleakage is big, has a strong impact on the normal combustion inside burner hearth, causes excess air system
Number rises, NOx discharge increase;Suppress to corrode by the way of the wind of side, air quantity dynamic pressure is relatively low, can not effectively change adherent place
Atmosphere constituent;This outer control can not realize intelligent automaticization, it is necessary to which operations staff oneself judges and adjust high temperature corrosion to prevent
Locking system, increase power plant's employee work amount and human error easily occur.
Utility model content
Purpose of utility model:For above-mentioned deficiency of the prior art, the utility model provides a kind of sootblower arrangement, energy
Enough alleviate water wall high temperature corrosion, simple in construction, good airproof performance is easy to operate, and system can be according to the combustion conditions reality of burner hearth
When be adjusted, realize intelligent soot blowing and prevent and treat high temperature corrosion dual purpose.
Technical scheme:In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of sootblower arrangement, it is characterised in that:Including:Bushing type shower nozzle, helix tube, soot blower valve, air valve, wall
Case, soot blower drive device and automatic control system,
Shower nozzle includes inner and outer tubes, and inner tube is set in outer tube;The inner tube of bushing type shower nozzle is connected with vapor, and it is fixed to realize
The purpose of phase soot blowing;Outer tube is connected with compressed air, realizes the purpose for blowing adherent wind for a long time;Inner tube passes through pipeline and soot blower valve
Connect, then connect with reheater import header, outer tube is connected by pipeline with air valve, then is connected with secondary air bellow;Soot blowing
The flow of device Valve controlling blowing medium vapor, air valve control the flow of blowing medium compressed air;
Shower nozzle is by the telescopic wall case installed in burner hearth of helix tube, shower nozzle moving freely by soot blower vertically
Drive device realizes that soot blower drive device includes motor, gear reduction box, sprocket wheel and chain;Motor passes through The gear deceleration
Case is connected with sprocket wheel, and the spigot nut of sprocket wheel and helix tube is connected by chain, and sprocket wheel rotates spigot nut, so as to force
Helix tube produces axial movement, purge position when driving the shower nozzle to reach different operating modes, 360 ° of purgings of shower nozzle is realized during work;
Automatic control system will according to boiler operating state, by adjust air valve, soot blower valve opening and closing degree with
And motor speed realizes that the preventing and treating of water wall high temperature corrosion and furnace heating surface soot blowing are removed contamination automatically.
Preferably, described sootblower arrangement, it is characterised in that:Also include frame, sootblower arrangement passes through machine
Frame is fixed in boiler side walls, and frame is made up of slotted-angle shelving, and bracket is welded with front panel, and soot blower is fixed on pot by bracket
On stove.
Further, described sootblower arrangement, it is characterised in that:The motor and gear reduction box are placed in frame
Face, when soot blower system is stopped transport, shower nozzle and helix tube are recovered in wall case and frame, when soot blower system works, shower nozzle and helix tube
It extend into burner hearth.
Preferably, described sootblower arrangement, it is characterised in that:The air valve passes through flange and pipeline phase
Connect, the valve element of air valve is the valve of a Mechanical course, supplies blowing medium-compression of different flow to shower nozzle on request
Air.
Preferably, described sootblower arrangement, it is characterised in that:The soot blower valve is used to control purging to be situated between
The flow velocity of matter, including the valve seat and control panel that can be revolved;The valve seat that can be revolved uses flat seal, behind valve seat, airflow direction
The upper control panel for also having a regulation pressure, the water vapour pressure in pipeline is set to be down to blowing required by soot blower using control panel
Sweep pressure.Vapor used in soot blowing comes from the pumping of reheater entrance header, and the operating pressure of vapor promotion is 0.8-
1.5MPa, operating temperature are less than 350 DEG C.
Preferably, described sootblower arrangement, it is characterised in that:Two are further opened with the top of the shower nozzle relatively
Venturi nozzle, for the water wall surface on oblique blown converter bore wall face.
Further, the adherent wind flow control of the venturi nozzle outlet is in 5-15m/s, to there is enough momentum
Flue gas layer at nearly wall is penetrated, forms a layer of air diaphragm;The adherent air quantity entered from soot blower in burner hearth accounts for Secondary Air
The 0.5-2% of total amount.
Preferably, the wall case provides sealing for the position of shower nozzle into burner hearth, and soot blower is bolted to
On the panel of wall case.
Preferably, described sootblower arrangement, it is characterised in that:Maintenance people is offered on described frame side wall
Hole.
Beneficial effect:Sootblower arrangement provided by the utility model, there is advantages below:
(1)The utility model does not increase water-cooling wall perforate, does not set up extras, because furnace heating surface soot blowing is interval
Operation, air injection is compressed in soot blowing gap, forms stable, high intensity oxidizing atmosphere in water cooling wall surface, subtract
Slow high temperature corrosion speed, protects furnace wall cooling, equipment is simple, and cost is cheap.
(2)The movement of helix tube axis can drive 360 ° of rotations of shower nozzle, can increase the compressed air that nozzle ejects and cover
Capping accumulates, and protects furnace wall cooling to a greater degree.
(3)When high temperature corrosion is not serious, shower nozzle is movable in wall case, so as to protect nozzle from high-temperature flue gas
Wash away abrasion.
(4)The anticorrosive dual-purpose system of soot blowing of the present utility model, air-tightness is good, and control accuracy is high, the overall adherent wind of burner hearth
Measure small, flame combustion will not be had an impact.
(5)The system is controlled by automatic control system, without any participation of power plant operations staff, reduces workload, real
Intelligent Prevention water wall high temperature corrosion is showed.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
In figure:Shower nozzle 1, inner tube 2, outer tube 3, pipeline 4, pipeline 5, soot blower valve 6, air valve 7, motor 8, The gear deceleration
Case 9, sprocket wheel 10, chain 11, helix tube 12, frame 13, automatic control system 14, Venturi nozzle 15, water-cooling wall 16, wall case
17th, inspection manhole 18, B are compressed air, and C is vapor.
Embodiment
The utility model is further described with reference to specific embodiment.
As shown in figure 1, be a kind of sootblower arrangement that can alleviate water wall high temperature corrosion of the utility model, the system bag
Include bushing type shower nozzle 1, Venturi nozzle 15, helix tube 12, soot blower valve 6, air valve 7, motor 8, gear reduction box 9, chain
Wheel 10, chain 11, wall case 17, frame 13, inspection manhole 18, automatic control system 14.Shower nozzle 1 is telescopic by helix tube 12
On wall case 17, Venturi nozzle 15 is housed on shower nozzle 1;
Wherein, shower nozzle 1 includes inner tube 2, outer tube 3, and inner tube 2 is set in outer tube 3;The inner tube 2 of bushing type shower nozzle is connected with height
Warm high-pressure steam, realize the purpose of selective sootblowing;Outer tube 3 is connected with compressed air, realizes the purpose for blowing adherent wind for a long time;Inner tube
2 are connected by pipeline 4 with soot blower valve 6, then are connected with reheater import header, and outer tube 3 passes through pipeline 5 and the phase of air valve 7
Connect, then connect with secondary air bellow;Soot blower valve 6 controls the flow of blowing medium vapor, and air valve 7 controls blowing medium
The flow of compressed air.The moving freely by soot blower drive device to realize vertically of shower nozzle 1, drive device is by motor 8, tooth
Wheel reduction box 9 and sprocket wheel 10 and chain 11 form;Motor 8 is connected by gear reduction box 9 with sprocket wheel 10, sprocket wheel 10 and spiral
The spigot nut of pipe 12 is connected by chain 11, and sprocket wheel 10 rotates spigot nut, so as to force helix tube 12 to produce axial fortune
It is dynamic, purge position when driving the shower nozzle to reach different operating modes, 360 ° of purgings of shower nozzle, helix tube pace can be realized during work
Reach 400-500mm/min.Whole purging system is fixed by frame 13, frame 13 is made up of slotted-angle shelving, on front panel
Bracket is welded with, soot blower is fixed on boiler by bracket;Motor 8 and gear reduction box 9 are placed in above frame 13, soot blower system
During stoppage in transit, shower nozzle 1 and helix tube 12 are recovered to machine frame inside, and when soot blower system works, shower nozzle and helix tube are extend into burner hearth.
Automatic control system 14 will be according to boiler operating state, by the opening and closing degree for adjusting air valve, soot blower valve
And motor speed realizes that the preventing and treating of water wall high temperature corrosion and furnace heating surface soot blowing are removed contamination automatically.
Inspection manhole 18 is offered on the side wall of frame 13, is easy to the disengaging manually overhauled.
Described air valve 7 is connected by flange with pipeline, and the valve element of air valve is the valve of a Mechanical course, can be with
Blowing medium --- the compressed air of different flow is supplied to nozzle on request.
Described soot blower valve 6 can control the flow velocity of blowing medium, and the valve seat that can be revolved uses flat seal, in valve seat
Behind, there is the control panel of a regulation pressure on airflow direction, drop the water vapour pressure in pipeline using this control panel
To the purging pressure required by soot blower.Vapor used in soot blowing comes from the pumping of reheater entrance header, and vapor pushes away
The operating pressure of Jie is 0.8-1.5MPa, and operating temperature is less than 350 DEG C.
Shower nozzle 1 is manufactured by oxida-tion-resistant steel, and two relative Venturi nozzles 15 are further opened with the top of shower nozzle, can
With the heating surface of water-cooling wall 16 on oblique blown converter bore wall face.The adherent wind flow control that Venturi nozzle 15 exports in 5-15m/s, with
Just there are enough momentum to penetrate flue gas layer at nearly wall, form a layer of air diaphragm;Entered from soot blower adherent in burner hearth
Air quantity accounts for the 0.5-2% of Secondary Air total amount.When soot blower disables, shower nozzle 1 is retracted into frame 13 and protected.
The position that wall case 17 enters burner hearth for shower nozzle 1 provides sealing, and soot blower is bolted on the panel of wall case 17;
Because inner flue gas of the stove is negative pressure all the time, therefore shower nozzle has enough air to enter in stove with the annular space at furnace wall, stove in short-term
Interior flue gas malleation, appended pipe joint can provide seal gas to wall case, if burner hearth flue gas is malleation all the time, should use
Special malleation wall case.
This soot blower for boiler hearth can not only clean furnace wall cooling surface, and can play protection water in soot blowing gap
Cold wall exempts from the effect of corrosive gas erosion, efficiently avoid high temperature corrosion, its core parts is one and venturi is housed
The bushing type shower nozzle of nozzle.When needing soot blowing, motor driven drive device, helix tube is rotated forward so that shower nozzle, which reaches, to be referred to
Determine soot blowing position, now soot blower valve is opened, and air valve is closed, and soot blower is removed contamination operating mode into soot blowing, can be entered on request
Row one encloses or multi-turn purging.At the end of soot blowing, you can immediately enter and blow adherent wind operating mode, now soot blower valves are closed, empty
Air valve is opened, and shower nozzle is by the 360 ° of rotations of required purging angle, and compressed air is in a steady stream constantly by Venturi nozzle along stove
The parallel ejection of thorax inwall, you can the adherent wind diaphragm spread to surrounding Uniform Flow is formed in water-cooling wall wall, so as to ensure
Oxidizing atmosphere is presented around water-cooling wall, avoids high-temperature corrosion in boiler.When high temperature corrosion is not serious, air valve is closed,
The supply of adherent wind is cut off, while shower nozzle is retracted to the initial position in wall case, can effectively protect nozzle from coal dust
Airflow scouring.
In boiler running process, when in blow adherent wind operating mode when, open air valve, extract one out from boiler flue collector
For part Secondary Air into soot blower, these Secondary Airs are close to the parallel ejection of water-cooling wall side wall inwall by Venturi nozzle.Control
The jet of nozzle exit is between 5-15m/s, preferably between 9-10m/s.Meanwhile adherent wind total amount is controlled to account for into pot
The 0.5-2% of stove burner hearth total blast volume, preferably below 1%.Adherent wind diaphragm, effective guarantee water can be formed at water-cooling wall
Cold wall pipe safety.
Described above is only preferred embodiment of the present utility model, it should be pointed out that:For the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (9)
- A kind of 1. sootblower arrangement, it is characterised in that:Including:Bushing type shower nozzle, helix tube, soot blower valve, air valve, wall Case, soot blower drive device and automatic control system,Shower nozzle includes inner and outer tubes, and inner tube is set in outer tube;The inner tube of bushing type shower nozzle is connected with vapor, and realization is periodically blown The purpose of ash;Outer tube is connected with compressed air, realizes the purpose for blowing adherent wind for a long time;Inner tube passes through pipeline and soot blower valve phase Connect, then connect with reheater import header, outer tube is connected by pipeline with air valve, then is connected with secondary air bellow;Soot blower The flow of Valve controlling blowing medium vapor, air valve control the flow of blowing medium compressed air;By on the telescopic wall case installed in burner hearth of helix tube, shower nozzle moving freely vertically is driven shower nozzle by soot blower Device realizes that soot blower drive device includes motor, gear reduction box, sprocket wheel and chain;Motor by gear reduction box with Sprocket wheel is connected, and the spigot nut of sprocket wheel and helix tube is connected by chain, and sprocket wheel rotates spigot nut, so as to force spiral Pipe produces axial movement, purge position when driving the shower nozzle to reach different operating modes, 360 ° of purgings of shower nozzle is realized during work;Automatic control system will be according to boiler operating state, by adjusting air valve, the opening and closing degree of soot blower valve and electricity Machine rotating speed realizes that the preventing and treating of water wall high temperature corrosion and furnace heating surface soot blowing are removed contamination automatically.
- 2. sootblower arrangement according to claim 1, it is characterised in that:Also include frame, sootblower arrangement passes through frame It is fixed in boiler side walls, frame is made up of slotted-angle shelving, and bracket is welded with front panel, and soot blower is fixed on boiler by bracket On.
- 3. sootblower arrangement according to claim 2, it is characterised in that:The motor and gear reduction box are placed in frame Face, when soot blower system is stopped transport, shower nozzle and helix tube are recovered in wall case and frame, when soot blower system works, shower nozzle and helix tube It extend into burner hearth.
- 4. sootblower arrangement according to claim 1, it is characterised in that:The air valve is connected by flange with pipeline, The valve element of air valve is the valve of a Mechanical course, supplies the blowing medium of different flow to shower nozzle on request.
- 5. sootblower arrangement according to claim 1, it is characterised in that:The soot blower valve is used to control blowing medium Flow velocity, including the valve seat and control panel that can be revolved;The valve seat that can be revolved uses flat seal, behind valve seat, on airflow direction The control panel of also one regulation pressure, the purging for making the water vapour pressure in pipeline be down to required by soot blower using control panel Pressure.
- 6. sootblower arrangement according to claim 1, it is characterised in that:Be further opened with the top of the shower nozzle two it is relative Venturi nozzle, for the water wall surface on oblique blown converter bore wall face.
- 7. sootblower arrangement according to claim 6, it is characterised in that:The adherent distinguished and admirable speed of the venturi nozzle outlet Control in 5-15m/s, there are enough momentum to penetrate flue gas layer at nearly wall, form a layer of air diaphragm;Enter from soot blower The adherent air quantity entered into burner hearth accounts for the 0.5-2% of Secondary Air total amount.
- 8. sootblower arrangement according to claim 1, it is characterised in that:The wall case is that the position of shower nozzle into burner hearth carries For sealing, soot blower is bolted on the panel of wall case.
- 9. sootblower arrangement according to claim 2, it is characterised in that:Inspection manhole is offered on the frame side wall.
Priority Applications (1)
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CN201720500364.5U CN206755199U (en) | 2017-05-08 | 2017-05-08 | A kind of sootblower arrangement |
Applications Claiming Priority (1)
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CN201720500364.5U CN206755199U (en) | 2017-05-08 | 2017-05-08 | A kind of sootblower arrangement |
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CN206755199U true CN206755199U (en) | 2017-12-15 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106940021A (en) * | 2017-05-08 | 2017-07-11 | 江苏方天电力技术有限公司 | A kind of sootblower arrangement |
CN108443899A (en) * | 2018-05-03 | 2018-08-24 | 青岛德固特节能装备股份有限公司 | A kind of soot blower structure |
CN110486743A (en) * | 2019-08-26 | 2019-11-22 | 湘潭大学 | A kind of soot blower for boiler horizontal gas pass |
CN112503553A (en) * | 2020-12-10 | 2021-03-16 | 国家能源集团泰州发电有限公司 | Soot blower for reducing high-temperature corrosion of water-cooled wall and working method thereof |
-
2017
- 2017-05-08 CN CN201720500364.5U patent/CN206755199U/en active Active
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106940021A (en) * | 2017-05-08 | 2017-07-11 | 江苏方天电力技术有限公司 | A kind of sootblower arrangement |
CN108443899A (en) * | 2018-05-03 | 2018-08-24 | 青岛德固特节能装备股份有限公司 | A kind of soot blower structure |
CN108443899B (en) * | 2018-05-03 | 2019-08-09 | 青岛德固特节能装备股份有限公司 | A kind of soot blower structure |
CN110486743A (en) * | 2019-08-26 | 2019-11-22 | 湘潭大学 | A kind of soot blower for boiler horizontal gas pass |
CN110486743B (en) * | 2019-08-26 | 2020-08-18 | 湘潭大学 | Soot blower for horizontal flue of boiler |
CN112503553A (en) * | 2020-12-10 | 2021-03-16 | 国家能源集团泰州发电有限公司 | Soot blower for reducing high-temperature corrosion of water-cooled wall and working method thereof |
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